Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	AZ0410001
PWS Name	AJO IMPROVEMENT COMPANY
PWS Type	Community water system
Owner Type	Public/Private
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	2654
County Served	Pima

The tables below list all violations that the state reported to EPA for this water system. Health-based violations are listed first, followed by treatment technique, MRDL, monitoring, reporting, and other violations.

Health-based	Violations of maximum contaminant levels (MCLs) or maximum residual disinfectant levels (MRDLs), which specify the highest concentrations of contaminants or disinfectants, respectively, allowed in drinking water; or of treatment technique (TT) rules, which specify required processes intended to reduce the amounts of contaminants in drinking water. MCLs, MRDLs, and treatment technique rules are all health-based drinking water standards.
Maximum Contaminant Level or MCL	The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.
Treatment Technique	A required process intended to reduce the level of a contaminant in drinking water.
Maximum residual disinfectant level or MRDL	The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.
Monitoring & reporting	Failure to conduct regular monitoring of drinking water quality, as required by SDWA, or to submit monitoring results in a timely fashion to the primacy agency or EPA.
Public notification & other	Failure to provide notification to the public as required by the Violations of Public Notification Rule and the Consumer Confidence Report Rule, and violations of other requirements such as those violations related to variances and exemptions.

Violations

Violation Category Code	Violation Type Description	Rule Name	Contaminant Name	Violation ID	Compliance Status Description	Compliance Period Begin Date	Compliance Period End Date	Is Health Based Ind
RPT	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	4197	Returned to Compliance	01-NOV-2024	-	No
RPT	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	4196	Returned to Compliance	01-OCT-2024	-	No
RPT	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	4193	Returned to Compliance	01-SEP-2024	-	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	4195	Returned to Compliance	01-JUL-2024	30-SEP-2024	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	4194	Returned to Compliance	01-JUL-2024	30-SEP-2024	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	4190	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	4191	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	4188	Returned to Compliance	01-APR-2023	30-JUN-2023	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	4187	Returned to Compliance	01-JAN-2022	31-MAR-2022	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	4186	Returned to Compliance	01-JUL-2021	30-SEP-2021	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	4184	Returned to Compliance	01-JUL-2020	30-SEP-2020	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	4181	Returned to Compliance	01-JAN-2019	31-AUG-2019	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	4182	Returned to Compliance	01-JAN-2019	31-AUG-2019	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	4180	Returned to Compliance	01-JUL-2018	30-SEP-2018	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	4171	Returned to Compliance	01-APR-2016	30-APR-2016	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	4170	Returned to Compliance	01-JUL-2015	-	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	4151	Returned to Compliance	01-OCT-2013	31-DEC-2013	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	4123	Returned to Compliance	01-JAN-2008	31-DEC-2008	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	4124	Returned to Compliance	01-JAN-2008	31-DEC-2008	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	4119	Returned to Compliance	01-JAN-2007	31-DEC-2007	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	4108	Returned to Compliance	01-JAN-2007	31-MAR-2007	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	4120	Returned to Compliance	01-JAN-2007	31-DEC-2007	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	3906	Returned to Compliance	01-APR-2006	30-JUN-2006	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	3606	Returned to Compliance	01-JAN-2006	31-MAR-2006	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	4112	Returned to Compliance	01-JAN-2006	31-DEC-2006	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	4111	Returned to Compliance	01-JAN-2006	31-DEC-2006	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	4122	Returned to Compliance	01-OCT-2005	-	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	3106	Returned to Compliance	01-OCT-2005	31-DEC-2005	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	2405	Returned to Compliance	01-JUL-2005	30-SEP-2005	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	2906	Returned to Compliance	01-MAY-2005	31-MAY-2005	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	2205	Returned to Compliance	01-APR-2005	30-JUN-2005	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	505	Returned to Compliance	01-FEB-2005	28-FEB-2005	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	1605	Returned to Compliance	01-JAN-2005	31-MAR-2005	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	4110	Returned to Compliance	01-JAN-2005	31-DEC-2005	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	4109	Returned to Compliance	01-JAN-2005	31-DEC-2005	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	405	Returned to Compliance	01-DEC-2004	31-DEC-2004	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	1305	Returned to Compliance	01-OCT-2004	31-DEC-2004	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	1105	Returned to Compliance	01-JUL-2004	30-SEP-2004	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	2805	Returned to Compliance	01-JUL-2004	-	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	4155	Returned to Compliance	01-APR-2004	30-JUN-2004	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	704	Returned to Compliance	01-JAN-2004	31-MAR-2004	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	605	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	2705	Returned to Compliance	01-JUL-2003	-	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	4128	Returned to Compliance	01-JUL-2002	-	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	199	Returned to Compliance	01-JAN-1998	31-DEC-1998	No
MR	Monitoring, Regular	Inorganic Chemicals	Mercury	4015889	Known	01-OCT-1988	31-DEC-1988	No
MR	Monitoring, Regular	Inorganic Chemicals	Fluoride	4015689	Known	01-OCT-1988	31-DEC-1988	No
MR	Monitoring, Regular	Inorganic Chemicals	Barium	4015489	Known	01-OCT-1988	31-DEC-1988	No
MR	Monitoring, Regular	Inorganic Chemicals	Chromium	4015589	Known	01-OCT-1988	31-DEC-1988	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	4016189	Known	01-OCT-1988	31-DEC-1988	No

1 - 50 of 54

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
792	4197	SOX	State Compliance achieved	30-DEC-2024	State	-
787	4196	SOX	State Compliance achieved	05-DEC-2024	State	-
785	4195	SOX	State Compliance achieved	05-DEC-2024	State	-
785	4194	SOX	State Compliance achieved	05-DEC-2024	State	-
778	4193	SOX	State Compliance achieved	11-OCT-2024	State	-
775	4190	SOX	State Compliance achieved	17-JUL-2024	State	-
775	4191	SOX	State Compliance achieved	17-JUL-2024	State	-
768	4188	SOX	State Compliance achieved	20-JUL-2023	State	Late date submitted 7/14/2023 RC17
763	4187	SIA	State Violation/Reminder Notice	27-APR-2022	State	-
760	4186	SIA	State Violation/Reminder Notice	15-NOV-2021	State	-
757	4184	SIA	State Violation/Reminder Notice	09-NOV-2020	State	-
752	4182	SOX	State Compliance achieved	26-NOV-2019	State	System submitted data late on 11/26/2019 HML 12/2/2019
752	4181	SOX	State Compliance achieved	26-NOV-2019	State	System submitted data late on 11/26/2019 HML 12/2/2019
744	4180	SIA	State Violation/Reminder Notice	26-OCT-2018	State	-
738	4171	SOX	State Compliance achieved	12-SEP-2016	State	April 2016 data submitted on 9/12/2016 CM17 09/12/2016
735	4170	SOX	State Compliance achieved	13-JUL-2015	State	-
734	4151	SOX	State Compliance achieved	09-APR-2014	State	-
723	4112	SOX	State Compliance achieved	01-APR-2009	State	-
723	4124	SOX	State Compliance achieved	01-APR-2009	State	-
723	4123	SOX	State Compliance achieved	01-APR-2009	State	-
723	4120	SOX	State Compliance achieved	01-APR-2009	State	-
723	4119	SOX	State Compliance achieved	01-APR-2009	State	-
723	4111	SOX	State Compliance achieved	01-APR-2009	State	-
723	4110	SOX	State Compliance achieved	01-APR-2009	State	-
723	4109	SOX	State Compliance achieved	01-APR-2009	State	-
720	4122	SOX	State Compliance achieved	10-APR-2008	State	-
717	4108	SOX	State Compliance achieved	11-JUL-2007	State	-
714	2906	SOX	State Compliance achieved	29-MAY-2007	State	-
714	405	SOX	State Compliance achieved	29-MAY-2007	State	-
714	505	SOX	State Compliance achieved	29-MAY-2007	State	-
713	605	SOX	State Compliance achieved	25-MAY-2007	State	-
707	199	SOX	State Compliance achieved	06-DEC-2006	State	-
718	2405	SOX	State Compliance achieved	10-OCT-2006	State	-
718	1305	SOX	State Compliance achieved	10-OCT-2006	State	-
718	3106	SOX	State Compliance achieved	10-OCT-2006	State	-
718	3606	SOX	State Compliance achieved	10-OCT-2006	State	-
718	3906	SOX	State Compliance achieved	10-OCT-2006	State	-
718	4155	SOX	State Compliance achieved	10-OCT-2006	State	-
718	2205	SOX	State Compliance achieved	10-OCT-2006	State	-
718	1605	SOX	State Compliance achieved	10-OCT-2006	State	-
718	1105	SOX	State Compliance achieved	10-OCT-2006	State	-
718	704	SOX	State Compliance achieved	10-OCT-2006	State	-
732	2805	SOX	State Compliance achieved	08-JUL-2004	State	-
731	4128	SOX	State Compliance achieved	17-JUL-2003	State	-
731	2705	SOX	State Compliance achieved	17-JUL-2003	State	-

1 - 45 of 45

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
WL-55-600490 - 10	4424	Yes	Well	Ground water	Permanent	Active
XWL-55-600489 - 3	4477	Yes	Well	Ground water	Permanent	Inactive
XWL-55-600486 - 2	4428	Yes	Well	Ground water	Permanent	Inactive
XWL-55-600487 - 1A	4427	Yes	Well	Ground water	Permanent	Inactive
XWL-55-600485 - 4	4426	Yes	Well	Ground water	Permanent	Inactive
WL-55-600488 - 12	8309	Yes	Well	Ground water	Permanent	Active
DISTRIBUTION SYSTEM	13817	No	Distribution System/Zone	-	-	Active
EPDS001	216	No	Sampling Station	-	-	Active
XEPHIS	17671	No	Sampling Station	-	-	Inactive
STORAGE TANK 001 - 500,000	21951	No	Storage	-	-	Active
STORAGE TANK 002 - 500,000	23376	No	Storage	-	-	Active
TP001 - CL2, AS	873	No	Treatment Plant	-	-	Active

1 - 12 of 12

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TP001 - CL2, AS	873	Rapid Mix	Particulate removal
TP001 - CL2, AS	873	Gaseous Chlorination, Pre	Disinfection
TP001 - CL2, AS	873	Flocculation	Inorganics removal
TP001 - CL2, AS	873	pH Adjustment, Pre	Softening (hardness removal)

1 - 4 of 4

For more information on a Water System:
Ask the operators of your water system, contact your primacy agency or file a Freedom of Information Act (FOIA) request.
Drinking water in general: Find out more about your drinking water web site or call the Safe Drinking Water Hotline (1-800-426-4791). EPA has also prepared a table about various regulated drinking water contaminants.
Tools for accessing EPA drinking water data: Safe Drinking Water Information System (SDWIS) Federal Reporting Services and Drinking Water Performance and Results Report.
Research Data: As well as monitoring the levels of drinking water contaminants for which EPA has set standards, EPA, states, and water systems also carry out studies of contaminants that may need to be regulated in the future. For more information about these contaminants, please see the National Contaminant Occurrence Database.

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